Wrench.



' APPLICATION FILED OCT. 5, 1911.

mmsssss:

T, H, GREGG.

WRENCH.

Patented Mar. 4, 1913.

t ld'it l hiir dTATEd PATENT @FFTQE.

THOMAS GRIGG, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO ROBERT G.

' GRIGG, 0F PHILADELPHIA, PENNSYLVANIA.

WRENCH.

Specification of Letters Patent.

Patented Mar. 4, 1913.

Application filed October 5, 1911. Serial No. 653,017.

To all whom it may concern Be it known that I, Tnonas H. Gsioo, a citizen or the United States, residing at Philadel hia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Wrenches, of which the following is a specification.

The object ofmy invention is to provide a wrench of novel,'simple and efiieient construction by means of which nuts may be readily tightened or loosened on freely rotatable arbors or other loose objects.

To this end the invention consists in the provision of a member having a nut-receiv ing opening therein and a hammer slidably connected to the member and having part arranged to strike a blow against the member and thereby tighten or loosen the nut, when the hammer actuated by hand, as will be hereinafter described and claimed.

In the accompanying drawings, illustrating my invention: l igure 1 is a perspective view of my improved wrench. Fig. 2 is a-side elevation, showing the wrench applied to a nut and the hammer in position to be actuated to loosen the nut. Fig.3 is a side elevation, showing the wrench applied to a nut and the position of the hammer after it has been actuated to loosen the nut. Fig. 4 is a detail partly in section, showing the manner in which the hammer is slidably connected to the nut-engaging member.

Referring to the drawings. 2 designates the nut-engaging member and 3 the hammer slid-ably connected thereto.

The nut-engaging member 2 comprises a flat portion 4; having a suitable shaped nutreceiviug opening or socket 5 therein and a shank (3 projecting from the portion 4 and having a guide opening 7 therein. In the form of enibeliment of my invention shown in the drawings, the nut-receiving opening 5 is hexagonal in shape but it will be readily understood that the shape of this opening may be changed to suit -various requirements.

The hammer 3 comprises a heavy, elongated, cylindrical body portion 8 having a rod-like project-ion '9 extending from one end thereof in axial alinement therewith. The projection 9 extends through and is slidably fitted to the guide opening 7 in the nut-receiving member 2; and the free end of the projection 9 is provided with a transverse pin 10 to prevent the projection 9 from being withdrawn from the guide opening 7. The wall of the guide opening 7 is made convex in form, as shown, to permit the projection 9 to slide freely therethrough and to prevent binding.

lVhen it is desired to loosen a nut on a freely rotatable arbor, the wrench is applied to a nut 11, as shown in Fig. 2, and the hammer 3 is moved to the position there shown. When the parts are in this position, the hammer 3 is moved by hand quickly in the direction of the arrow, thereby causing the main body of the hammer 3 to strike a blow against the member 2 and move it to the posit-ion, shown in Fig. 3 and thereby loosen the nut 11 before the loosely-mounted arbor carrying the nut responds to the blow of the hammer. It will be readily understood that when it is de sired to tighten a nut the member 2 should be applied to the nut in a reverse direction. The hammer 3 is made heavier than the member. 2 so that the blow struck by the hammer against the member will readily actuate the latter to tighten. or loosen a nut;

and the hammer 3 is elongated in the direction. of its path of movement to receive the -lull benefit of its weight in striking the member 2.

It will be observed that the axis of the nut-receiving opening 5 extends through a planesubstantially atright angles to a plane through which the axis of the guide opening 7 extends, so that the hammer 3 will be directed by the guide opening? to move through a. plane substantially at right angles to the axis of the nut-receiving open ing 5, thereby causing the hammer 3 to act upon the member 2 in the proper direction in the tightening or loosening a nut.

I claim:

1. A wrench comprising a member pro vided with a nut-receiving opening, and a hammer slidably connected to said member and movable with relation thereto throughand guided in a plane substantially atright angles to-the axis of said opening and arranged to strike said member.

2. A wrench comprising a member provided with a nut-receiving opening and a gulde opening, he axes of said openings extending through planes wbstuntiaily at right angles to each other, and a hmniner having a guide extension slid ably fitted to said guide opening and having a part movable into and from engagement with said member.

In testimonywhereof ziflix my signature in presem'e of two witnesses.

THOR/[AS H. GRIGG. \Vitnesses 7 'WM. HAnmsoN SMITH, G. P.5SI-IARKEY. 

